4, 17-dioxa-a, d-bishomo-steroidal lactone



United States Patent 3,389,150 4,17-DIOXA-A,D-BISHOMO-STEROIDAL LACTONE Gerald W. Krakower, Elizabeth, N.J., assignor to E. R.

Squibb & Sons, Inc New York, N.Y., a corporation of Delaware No Drawing. l iied Mar. 21, 1966, Ser. No. 535,677

1 Claim. (Cl. 260-343.2)

ABSTRACT OF THE DESCLOSURE This disclosure relates to the compound lp-acetoxy- 4aa,8,14-trimethyl4,l7-dioxa-A,D-bishomo 18 nor-a, 804,96,l3m,14[3-androstane-3,11,l7a-trione, prepared by treating methyl 16B-acetoxy-3,ll-diketo-4a,8,l4-trimethyl-18-nor-5a,8a,9[3,l3a,14fl-cholesta-17(20), 24-dien-21- oate with ozone followed by reacting the mixture thus formed with a perocidic acid. This compound possesses anti-androgenic and estrogenic activity.

This invention relates to and has as its obiect the provision of a new physiologically active steroid.

More particularly, this invention relates to 16,8-acetoxy- 4aa,8,l4-trimethyl-4,17-dioxa-A,D-bishomo 18 nor-5a, 811,9533e,14,8-androstane-3,1l,17a trione.

The novel compound of this invention is a pharmacologically active substance which possesses anti-androgenie activity (i.e., it inhibits the actions of androgens), and which may be used in the treatment of such conditions as hyperandrogenic acne. It also possesses estrogenic activity.

The compound may be formulated for such administration, the concentration and/or dosage being based on the activity of the particular compound and the require ments of the patient.

The compound of this invention may be prepared according to the process of this invention beginning with l6,8-acetoxy4a,8,14-trirnethyl 18- nor -5a,3ot,9fi,13oc,l4fiandrostane-3,11,17-trione. It has been discovered that by treating this starting material with a peracid such as perbenzoic acid, monoperphthalic acid or m-c-hloroperhenzoic acid in a suitable solvent such as chloroform, methylene chloride or benzene at a temperature of from 0 to 40 C. the product of this invention is formed.

Further, it has been discovered that ozonation of methyl 16fl-actoxy-3,11-diketo 4a,8;l4-trimethyl-lS-nor- 5a,8ut,9fl,l3cc,14B-Ch0l8Sta-17'(20), 24-dien-21-oate followed by reacting the mixture thus formed with a peraci-dic acid as set forth above, the product formed is the compound of this invention. The starting compound of this procedure is prepared in accordance with the process described in c-open'ding application SN 535,719 filed in the patent oflice on the same date as this application.

The following examples illustrate this invention; all temperatures are in degrees centigrade unless otherwise stated:

Example 1. 16,8-acetoxy-4ae,8,14 trimethyl-4,17-dioxa- A,D-bishomo 18 nor 5a,8a,9;8,13a,l4B-andr0stane- 3,11,17a-trione A solution of 194 mg. of 16B-acetoxy-4a,8,l4-trimeth- 3,389,150 Patented June 18, 1968 yl-l8-nor-5a,8a,95,l3a,14fl-androstane-3,11.,17-trione and 345 mg. of m-chloroperbenzoic acid in 10 ml. of methylene chlo ide is kept in the dark at room temperature for sixty-five hours. The crystalline material which settles out of the solution (107 mg. of m-chlorobenzoic acid, M.P. 151-152 C.) is filtered and washed] with benzene. The filtrate and washings are diluted with benzene and washed successively with 5% potassium iodide, 5% sodium sulfite, saturated sodium chloride, 5% potassium bicarbonate, and saturated sodium chloride solutions. After drying, the solvent is evaporated to give 200 mgof residue, which on recrystallization from methanol gives 122 mg. of 16,8-acetoxy-4aa,8,14-trimethyl-4,17- dioxa-A,D-bishomo-1S-nor 5a,8m,9t2,13m,14/3-androstane- 3,11,17-a-trione, M.P. 222-224 C. The analytical sample has M.P. 22923l C., [Ot] +21 (chloroform).

Analysis.Cal-cd for CggHggOq: C, 65.69; H, 7.67. Found: C, 65.70; H, 7.73.

Example 2. 16,8-acetoxy-4au,'8,14-trirnethyl-4,l7-dioxa- A,D-bishomo 18 nor 5a,8a,9p,13a,]j4B-androstane, 3,11,17a-trione A solution of one part (by weight) of 16,8-acetoxy- 3,1l-dieto-4a,8,l4-trimethyl 1S nor 5u,8zx,9[3,130,14- cholesta-l7 (20), 24diene2l-oic acid or its methyl ester in twenty-five parts (by volume) glacial acetic acid is cooled to +10 C. A stream of oxygen containing 10 moles of ozone per mole of substrate is passed through this solution. Helium is then bubbled through the solution for thirty minutes and the acetic acid evaporated in vacuo. The residue is taken up in ethyl acetate and the solution washed with 5% sodium bicarbonate and Water, dried and evaporated. The residue is recrystallized from methanol. The first crop consists of high melting 16 ,3-acetoxy-4a,8, 14-t-rimethyl-17-oxa-Dhomo 18 BOP-50c, 8a,9e,13,l4/3- androstaue-3,11,17a-trione. The latter crops consist of a mixture of this compound and 16B-acetoxy-4a,8,l4-trimethyl-l8-I10f5oc,'8a,9/3,13a,145 androstane 3,11,17-trione.

A solution of 1.50 g. of this mixture, 2.6-7 g. of mchloroperbenzoic acid in 37 ml. of methylene chloride is reacted and worked up as described in Example 1. From this reaction is obtained 842 mg. of 16,8-acetoxy- 4aa,8,l4-trimethyl-4,17-dioXa-A,D bishomo lS-r-5oz, 8ou9p,13a,14fl-androstane-3,11,17a-trione whose melting point and other physical properties are identical with those described in Example 1.

The invention may be variously otherwise embodied within the scope of the ground claim.

What is claimed is:

1. 16/3,acetoxy-4au,S,14 trimethyl 4,17-dioXa-A,D biShOl'110-18nOr-5a,8oc,9fi,13:4,14fl androstane 3,11,1721- trione.

References Cited UNITED STATES PATENTS 3,101,349 8/1963 Pappo et al 260-3452 JAMES A. PATTEN, Primary Examiner. 

